In the Pacific, Roosevelt Hoover`s policy of not recognizing Japanese conquests in Asia continued. However, when Japan invaded China in 1937, it seemed to detach itself from isolationism. He did not run for the newly revised Neutrality Act, and in October he warned that war was like a disease and suggested that it might be desirable for peaceful nations to “under-quarantine.” He quickly denied that his statement had political implications, and in December, when Japanese planes sank an American gunboat into the Yangtze River, thoughts of retaliation were stifled by public apathy and Japan`s offer of apology and compensation. With strong public resistance to foreign intervention, Roosevelt focused on regional defense, continued to build the navy and signed mutual security agreements with other governments in North and South America. The United Kingdom was not the only nation to have such an agreement with the United States. During the war, the United States entered into lease agreements with more than 30 countries and spent about $50 billion in aid. Although British Prime Minister Winston Churchill later called the initiative “the most dishonest act” one nation had ever done for another, Roosevelt`s main motivation was not selflessness or selfless generosity. Instead, Lend-Lease was to serve America`s interest in defeating Nazi Germany without entering the war until the American military and public opinion were ready to fight. At a time when the majority of Americans opposed direct participation in the war, Lend-Lease represented an important contribution of the United States to the fight against Nazi Germany. Moreover, the joint action signed in Article VII of the joint action signed by the United States and the recipient countries laid the groundwork for the creation of a new international economic order in the post-war world. On June 6, 1941, Roosevelt, after negotiating with Churchill, ordered the occupation of Iceland to replace the British invasion troops. On June 6, 1941, the U.S. Navy sent Task Force 19 (TF 19) from Charleston, South Carolina, to gather in Argentia, Newfoundland.
TF 19 included 25 warships and the 1st Provisional Naval Brigade with 194 officers and 3,714 men from San Diego, California, under the command of Brigadier General John Marston.  Task Force 19 (TF 19) sailed from Argentia on 1 July. On 7 July, Britain convinced the Althing to authorize an American occupying force as part of a US-Island defence agreement, and TF 19 moored the day before Reykjavik. The U.S. Marines began landing on July 8 and the landing ended on July 12. The U.S. Navy established an air base in Reykjavik with the arrival of Patrol Squadron VP-73 PBY Catalinas and VP-74 PBM Mariners. In August, U.S. Army personnel arrived in Iceland and the Marines were transferred to the Pacific until March 1942.  Up to 40,000 U.S.
military personnel were deployed to the island, exceeding the number of adult Icelandic men (at the time, Iceland had about 120,000 inhabitants. The agreement was that the U.S. military remained until the end of the war (although the U.S. military presence in Iceland remained until 2006, when Iceland became a member of NATO after the war). Instead, the United States would “lend” the deliveries to the British and defer payment. If the payment eventually took place, the focus would not be on paying in dollars. The tensions and instabilities created by the war debt of the 1920s and 1930s had shown that it was unreasonable to expect bankrupt European nations to be able to pay for every item purchased in the United States.